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Power transformers -- Part 14: Design and application of liquid-immersed transformers using high-temperature insulation material
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Basic data | Standard ID | GB/Z 1094.14-2011 (GB/Z1094.14-2011) | | Description (Translated English) | Power transformers -- Part 14: Design and application of liquid-immersed transformers using high-temperature insulation material | | Sector / Industry | National Standard | | Classification of Chinese Standard | K41 | | Classification of International Standard | 29.180 | | Word Count Estimation | 38,372 | | Date of Issue | 2011-12-30 | | Date of Implementation | 2012-05-01 | | Quoted Standard | IEC 60317-0-1; IEC 60317-0-2; IEC 60317-0-3; IEC 60317-0-4; IEC 60317-0-5; IEC 60317-0-6; IEC 60317-0-7; IEC 60317-1; IEC 60317-12; IEC 60317-13; IEC 60317-15; IEC 60317-16; IEC 60317-17; IEC 60317-18; IEC 60317-19; IEC 60317-20; IEC 60317-21; IEC 60317-2; IEC 60317-22; IEC 60317-23; IEC 60317-25; IEC 60317-26; IEC 60317-27; IEC 60317-28; IEC 60317-29; IEC 60317-31; IEC 60317-3; IEC 60317-32; IEC 60317-33; IEC 60317-34; IEC 60317-35; IEC 60317-36; IEC 60317-37; IEC 60317-38; IEC 60317-39; IEC 60317-40; IEC 60317-4; IEC 60317-42; IEC 60317-43; IEC 60317-44; IEC 60317-46; IEC 60317-47; IEC 60317-48; IEC 60317-49; IEC 60317-50; IEC 60317-51; IEC 60317-52; IEC 60317-53; IEC 60317-54; IEC 60317-55; IEC 60317-57; IEC 60317-58; IEC 60317-8; IEC 60554-3-1; IEC 60554-3-2; IEC 60 | | Adopted Standard | IEC/TS 60076-14-2009, IDT | | Regulation (derived from) | ?National Standard Approval Announcement 2011 No.22 | | Issuing agency(ies) | Ministry of Health of the People's Republic of China | | Summary | This standard specifies the use of high temperature insulation material or technical specifications of high temperature insulation materials combined with conventional insulation materials liquid-immersed transformers, design, tests and load and other information. For manufacturing and users. This standard applies to: design according to IEC 60076-1 power transformers, according to IEC 61378 series of standards designed converter transformer, arc furnace transformer. It also includes the use of a variety of liquid and solid insulation insulation combinations. For high-temperature insulating material traction transformers, this standard also has a guiding role. | GBZ1094.14-2011: Power transformers -- Part 14: Design and application of liquid-immersed transformers using high-temperature insulation material
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Power transformers. Part 14. Design and application of liquid-immersed transformers using high-temperature insulation material
ICS 29.180
K41
People's Republic of China national standardization of technical guidance documents
Power transformers Part 14. High temperature insulation
Design and Application of Liquid Immersed Transformer
Powertransformers-Part 14.Designandapplicationofliquid-immersed
(IEC /T S60076-14.2009, IDT)
Posted on December 30,.2011
2012-05-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Directory
Foreword Ⅲ
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 insulation 4
4.1 Overview 4
4.2 insulation aging and life 4
4.3 solid insulation 5
4.4 wire insulation coating 6
4.5 Insulation liquid 7
5 insulation system 9
5.1 Overview 9
5.2 insulation system type 9
6 temperature limit 12
7 Transformer Accessories and Compatibility 14
7.1 Overview 14
7.2 Casing 14
7.3 tap changer 15
7.4 Sealing material 15
7.5 tank painting 15
7.6 Cooler 15
7.7 oil pump 15
7.8 Fuel tank and oil conservator 15
7.9 Adhesive 15
7.10 current transformer 16
7.11 Thermostat 16
7.12 protection relay 16
7.13 Auxiliary Cables
Special considerations when designing 16
8.1 Short circuit considerations 16
8.2 insulation requirements 16
8.3 Temperature Requirements 16
8.4 Overload 18
8.5 Harmonic Current Effect 18
8.6 Oil Protection System 18
Information Needed 18
9.1 User should provide information 18
9.2 Information to be provided by the manufacturer 19
Nameplate and supplementary information
10.1 Nameplate and warning plate 19
10.2 Transformer Manual 19
11 Test 19
11.1 Overview 19
11.2 Routine tests, type tests and special test requirements 20
11.3 Temperature rise test 20
11.4 Insulation type test 22
Monitoring, diagnosis and maintenance
12.1 Overview 22
12.2 Mineral oil impregnated transformer 22
12.3 high temperature insulation liquid immersion transformer 22
Appendix A (informative) and this part of the normative references to international documents consistent correspondence between our documents 23
Appendix B (Informative) See Table 4 and Table 5 transformer temperature 24
Appendix C (Informative) Calculation of bubble generation temperature 25
C.1 Overview 25
C.2 Basic assumptions 25
C.3 Mathematical formula for bubble generation 26
References 30
Foreword
GB 1094 "Power Transformer" is divided into the following sections.
--- Part 1. General principles;
--- Part 2. Temperature rise;
--- Part 3. Insulation level, insulation test and external insulation air gap;
--- Part 4. Power transformer and reactor lightning shock and operational impact test guidelines;
--- Part 5. To withstand short-circuit ability;
--- Part 6. Reactors;
--- Part 7. Oil-immersed power transformer load guide;
--- Part 10. Sound level determination;
--- Part 10.1. Application of sound level measurement guidelines;
--- Part 11. Dry-type transformers;
--- Part 14. Design and application of liquid immersed transformers with high temperature insulation.
This guidance document is part 14 of GB 1094.
This instructional document has been drafted in accordance with the rules given in GB/T 1.1-2009.
This guideline uses the translation method equivalent to IEC /T S60076-14.2009 "Power Transformer Part 14. High
Design and Application of Liquid Immersion Transformer with Thermal Insulation "(in English).
The Chinese documents with a consistent correspondence between the normative references in this Guidance Document are in Appendix A.
The following technical amendments to IEC /T S60076-14.2009 have also been made in this Guidance Document.
a) Replace "This International Standard" with "This Guidance Technical Paper";
b) Use the decimal "." instead of the comma "," as the decimal point;
c) Delete the foreword of IEC /T S60076-14.2009;
Please note that some of this document may be patentable. The issuing agencies of this document do not bear the responsibility of identifying these patents.
This guidance document is proposed by China Electrical Equipment Industry Association.
The guidance of technical documents by the National Standardization Technical Committee Transformer (SAC/TC44) centralized.
The drafting of the guidance of technical documents. Shenyang Transformer Research Institute, CLP Electric Group Co., Ltd., Baoding Tianwei change Electric shares
Co., Ltd., East China Power Grid Co., Ltd., Xi'an XD Power Transformer Co., Ltd., Shun Special Electric Equipment Co., Ltd., TBEA Hengyang change
Compressor Co., Ltd., Pearl Electric Co., Ltd.
The main drafters of this technical document are Zhang Xianzhong, Xu Zihong, Hu Zhenzhong, Jiang Yimin, Gao Chuanlong, Liu Yan and Cai Dingguo.
Introduction
For decades, as defined by IEC 60076-2, the average temperature rise of liquid immersed transformer windings has been limited to 65K/70K, with the top oil
Temperature rise is limited to 60K.
Historically, winding conductors in liquid immersed transformers have been insulated with cellulose paper or enamel, and other solid insulating materials
Material is also a cellulose product. As for the insulating liquid, mineral oil is still the most important. These insulation materials are still dominant today.
The vast majority of the operating experience accumulated by transformers over the years is based on these insulation materials and temperature rise limits. Sometimes
Space and weight limitations require designers to employ higher temperature rise values to reduce transformer size and reduce transformer weight. this
, Better insulating materials (solid and liquid) are required, the temperature limits of which are higher than those conventionally specified and the aging characteristics at this high temperature are still
Good and have an acceptable life expectancy. Sometimes high-temperature insulation can also be used in some parts of the winding that are considered hot.
Recently adopted fiber optic measurement techniques show that the hot spot temperature is sometimes higher than expected. Even in some cases much higher. In this way, old
The conversion rate will be higher than expected. With this measurement, the location of the hot spot and the phase at which high temperature insulating material etc. may be used
Knowledge.
From wire enamels and wraps to pads, stays and structural supports and other high temperature insulation has been used for large power transformers, small distribution transformers
Mobile transformers, electric vehicles (traction) transformers and rectifier transformers. Flash point is much higher than 300 ℃, suitable for high temperature than mineral oil
Class K fluids have been used for decades. Their use and scope are rapidly increasing. Over the years, the transformer manufacturer in order to meet
A variety of special needs of use, has been designed to make the transformer using high-temperature materials, so as to achieve the transformer light weight, high capacity density, anti-
Fire ability, long life purpose.
The purpose of this technical specification is to start the standardization process of developing liquid immersed transformers with high temperature insulation. From the system, solid absolutely
Edge may include a variety of materials, they have different heat resistance levels. Insulating and cooling fluids can also range from mineral oils to a variety of new ones
K-class liquid, but also a variety of heat capacity.
Insulation systems consisting of liquid and solid insulating materials used in current standard liquid immersed transformers have occurred and developed in excess of
100 years. Therefore, its application rules and guidelines are also reliable and well researched. The corresponding high temperature insulation materials and the use of high temperature insulation
Materials transformers are relatively new in application and research.
Therefore, we should not be surprised at the fact that many materials are not sufficiently researched and not clearly understood. So build and maintain a text
It is important to provide a starting point for discussion between the manufacturer and the user. This specification is expected to grow as the research progresses
Updated.
This document is not a separate document and it must be used in conjunction with the extensive information and guidance provided in other documents in the IEC 60076 series.
This document therefore follows two principles.
First, liquid immersed transformers are very popular, other standards in this series have made a very good standard, so in addition to the reference value or test
Given the need to emphasize or compare purposes, this specification does not duplicate the details of these transformers.
Second, conventional liquid-immersed transformers are insulated with sulfuric paper, laminates, wood, mineral oil, and many other common materials,
Work under the limit is normal and considered to be normal or routine. All others have more than the thermal capacity used for normal insulation systems
Solid or liquid insulating material, considered a high temperature material.
Therefore, this "standard" or "normal" insulation system is defined as a "conventional" insulation system for comparison purposes, with their normal temperature limits
Out to illustrate the difference with other high temperature system. The commonly used solid and liquid insulation with a common list of methods to facilitate the typical
Can be compared, and explain the use of relatively unfamiliar materials and performance.
This specification emphasizes loads, overloads, tests and accessories in the same way. Information on selected "conventional" transformers, used only
Compare or emphasize the purpose. Other direct reference to the appropriate IEC file.
Power transformers Part 14. High temperature insulation
Design and Application of Liquid Immersed Transformer
1 Scope
This Guidance Document dictates the use of high temperature insulation materials or high temperature insulation materials and conventional insulation combination of liquid immersion type
Pressure vessel specifications, design, test and load information for use by manufacturers and users.
This guidance applies to technical documents.
--- According to IEC 60076-1 design of power transformers;
--- According to IEC 61378 series of standards designed converter transformer;
--- Electric arc furnace transformer.
Also includes the use of a variety of liquid insulation and solid insulation combination.
For traction transformers with high temperature insulation materials, this Guidance Document also provides guidance.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
IEC 60076-1.1993 power transformers Part 1. General (Powertransformers-Part 1.General)
IEC 60076-2 Power Transformer Part 2. Temperature rise (Powertransformers-Part 2.Temperaturerise)
IEC 60076-3 Power transformers - Part 3. Insulation levels, insulation tests and external insulation air gaps (Powertransform-
ers-Part 3.Insulation levels, dielectrictestsandexternalclearancesinair)
IEC 60076-5 Power Transformers Part 5. Capability to withstand short circuits (Powertransformers-Part 5.Abilityto
withstandshort-circuit)
IEC 60076-7-2005 Power transformers - Part 7. Oil-filled power transformer load guidelines (Powertransformers-
Part 7.Loadingguideforoil-immersedpowertransformers)
IEC 60085 electrical insulation heat classification (Electricalinsulation-Thermal classification)
IEC 60216-1, Electrical insulating materials, heat resistance - Part 1. Evaluation of aging procedures and test results (Electrical
insulatingmaterials-Propertiesofthermalendurance-Part 1.Ageingproceduresandevaluationof
testresults)
IEC 60296 Electrotechnical Fluid Transformers and Switches for Unused Mineral Insulating Oil (Fluidsforelectrotechnical
applications-Unusedmineralinsulatingoilsfortransformersandswitchgear)
IEC 60317 (all parts) Special winding wire specifications (Specificationsforpartulaulaypesofwindingwires)
IEC 60554-3 (All parts) Specification for cellulosic paper for electricians - Part 3 - Specificationfor
celulosicpapersforelectricalpurposes-Part 3.Specificationsforindividualmaterials)
IEC 60641-3 (All parts) Specification for cardboard and platen for electricians - Part 3 - Specifications for individual materials (Pressboardand
presspaperforelectricalpurposes-Part 3.Specificationsforindividualmaterials)
IEC 60674-3 (All parts) Specification for plastic film for electrical applications - Part 3. Plastic material specifications
electricalpurposes-Part 3.Specificationsforindividualmaterials)
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